1. Remove shift knob, by turning counter-clockwise. It comes off pretty easily. 

NOTE: some models have a different mounting for the shift knob. It's held by a cramped ring  which is impossible to remove without destroying it. The knob then just pulls straight off. Then you need a new means of securing the knob on the stick, I have used galvanised wire, twisted to tension it, and trimmed to avoid damaging the boot. 

Remove the plastic trim piece holding the bottom of the shift boot to the console. It comes off easily as it's held only by a few soft plastic prongs. The best way to do this is to pull it gently up starting from one side and working your way around.

2. Remove the old boot by taking out the staples. Mount your RedlineGoods shift boot on the original trim piece. You might want to punch the same staples back in, or use small pieces of thin copper wire instead. Slide the wire through the two adjacent holes (left by the staples in the trim piece) while making appropriate holes in the shift boot if needed, and twist the ends of the wire together. 4 pieces of wire, one in each corner, will suffice.

3. Remove the shift knob assembly from the old boot (the upper plastic piece is just pushed into the lower one thus holding the boot - pull down the lower element to disassemble it) and install the top of the new boot the same way.

4. Remove the boot from the shifter by taking off the rubber band, and removing the small metal ring. After these are removed, just slip the boot off the shifter. This picture shows one of the elements freed from the assembly. 

5. Reinstall the boot and knob assembly in the center console.